Analise o fragmento do arquivo de log apresentado
abaixo:
Feb 11 10:15:22 firewall kernel: [1234567.123456]
Dropped 100 SYN packets from 192.168.1.110:1234 to
203.0.113.5:80, rate-limit exceeded
Feb 11 10:15:25 firewall kernel: [1234567.123457]
Dropped 150 SYN packets from 192.168.1.101:5678 to
203.0.113.5:80, rate-limit exceeded
Feb 11 10:15:28 firewall kernel: [1234567.123458]
Dropped 120 SYN packets from 192.168.1.122:9876 to
203.0.113.5:80, rate-limit exceeded
Aparentemente, esse fragmento de log de firewall mostra: